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This is how it's going to go down, folks. Each week, starting this Saturday, I will post a certain picture to the group. This picture will be of a tablescrap-esque item with hidden innards. Your challenge each week you choose to participate will be to figure out how it's built, and privately show or explain to me your solution. The catches:
• There may be -- and often will be -- more than one correct solution. As long as you achieve the same result, it's acceptable.
• I will put limitations on how each one may be built (e.g., "no headlight bricks")
You will have a week (until the next Friday night) to reverse-engineer mine and present to me the results. I will keep a running tally of everyone who enters, and at the end of each cycle I will award one point to each person who correctly builds the item, as well as reveal my own solution.
I will give a follow-up question to everyone who solves the original; solving this gains you an extra point!
There is no one "best" solution to many of these; and as such, everyone who solves an item correctly earns a point, no matter who else solves it, who solves it first, or how exactly it's solved. Every solution must be approved by myself, of course, to prevent any irrelevant entries.
Prizes:
1st place: A small assortment of custom parts made by L.D.M., a microtank, and a small set (small set TBD).
2nd place: The pure pride that comes from having beaten nearly everyone else.
There's no need to sign up. You could enter every week, every other week, or only once; the more you enter, though, the more points you could get! It's entirely your choice each cycle.
Be prepared!
Avondale Maintenance innovates a way to protect existing highway markers during oil coat maintenance.
GB Railfreight Class 92, 92006 - fresh out of Brush after over 13 years in store - propels miscreant sister locomotive 92033 back out of Crewe station towards the Down Holding Siding.
The pair had been on a test run to Carlisle in the morning but 033, which was leading north, had encountered issues and the run was caped at Preston. 033 was on test itself after some recent issues/repairs but also acting as "insurance" for the long-time stored 006.
However, the tables were turned, as 92 006 dragged 92 033 south from Preston to Stafford on 0Z69, then round its stricken stablemate there before hauling the pair back to Crewe.
Taken with a 24mm reversed onto extension tubes. A hinged hot shoe allows the flash to lean out over the stack. A DIY snoot fires the light in front of the lens.
The underside of the unit.
Taking apart, looking inside, and case modding an RFID credit card keychain.
Read more here
a trial of using double lens reverse macro technique for microphotography on a cross section of a plant root.
55-250IS@250mm on 500D body with 18-55IS@18mm reverse mounted. This was mounted above an old microscope (with viewing optics removed) to use the mount and light for lighting and micro adjustement of focus. Shake is a major issue and this set up requires alot of light, so even with the microscope illumination, i used both lenses wide open, ISO 6400, Av with -1Ev for 1/320s exposure.
lens set up gives a calculated magnification of 250/18=13.8x. On a canon APS-C 1.6x crop factor this gives a FOV of approximately 1.6mm. After softening and noise, resolution is a little shy of the micrometer range.
Reverse mounting lens for macro shooting.
50mm f1.4 lens on 58mm Canon mounting macro reverse ring, all mounted in reverse mode on macro 12mm keno tube (macro ring).
:-)
pic taken with PowerShot G5.
Sorry for dusty environment ...
the backlit reverse of the "Arlington" tessellation, as named by Jorge Jaramillo.
Really, it's just an exploration of box pleating (a common technique for uniaxial, representational origami) combined with tessellations ( that has more dimensions with which to contend.)
Or perhaps more appropriately: I like taking shots of things using a light table.
on the reverse:
Grand Trunk 559
Niagra Falls, Ontario 7/16/20
Raymond from Oldtimetrain website added this information:
"My research indicates it is S-1-f class 2-8-2 559 built MLW 53929 1913. Re#3464. Retired 1961."
View On Black. Everyone always photographs this arch in the Alabama Hills (California) facing west (with Lone Pine Peak or Whitney in the middle). Here's a comp facing east, at dusk rather than dawn. The mountains to the east aren't as impressive, but there is actually a road that leads into the distance, which you can see if you zoom in.
Taken just before heading off to Mount Langley on a trip in August 2009.
The lens has been fitted (reversed) on the Sony. The old shiny metal Minolta MD mount faces outwards as the macro lens objective.
So how does this perform? My guess by comparison with a 1:1 macro lens is that it supplies a roughly 3:1 macro image, i.e. a magnification of 3X a 1:1 macro image.
The next photograph (click this link) shows a full size image of part of a two pound (UK) coin.
This clickable link takes you back to the image of the lens on the Minolta camera.
Original: DSC03078X
A good view of how reverse thrust works as the engines on F-GITF kick up runway water while slowing down.
The reverse of the two girls with a doll photograph, a Carte de visit , small size photo 105 x 65mm , the most popular size in the Victorian era , they were commonly given out to friends and family on home visits . They were popular from 1860 - 1866 . The albumen photo was attached to a printed card usually displaying the photographers name and address .
Personal Collection , a Germanic album with no names other than the photographers .
Letter on reverse (below) with postage cancelled on 17.5.1914 in MĂĽlhausen. Photogr. Jean Mehlbreuer, MĂĽlhausen.
Recruits from 4 Kompagnie, 7. Badisches Infanterie-Regiment Nr.142 pose for yet another of those madcap barrack-room photos where every man is either holding something or performing a chore associated with military life.
It is interesting to note the armed men wearing the larger ammunition pouches usually issued to wĂĽrttembergisch regiments.
The barracks were divided into smaller rooms called Stuben. Each Stube housed between 10 and 20 recruits and each man had his own locker, which he was expected to keep in order according to military regulations.